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#Shift register using spi arduino serial#
#Shift register using spi arduino full#

The following image shows the connections between STM32 and Arduino to demonstrate STM32 SPI Tutorial.įirst, make a note of the SPI Pins in both STM32 Board and Arduino UNO. USB to UART Converter (if STM32 is programmed via UART).STM32F103C8T6 MCU based STM32 Blue Pill Board.You can extend this project and use 16×2 LCDs with both STM32 Blue Pill Board and Arduino UNO and display some information. Similarly, when the Push Button connected to Arduino UNO is pressed, the LED on STM32 Blue Pill Board will be turned ON. When the Push Button connected to STM32 is pressed, the LED on Arduino will be turned ON. Both the boards are connected with external Push Buttons and I will also use the on-board LEDs on each board. The following table shows all the pins associated with SPI in STM32F103C8T6 MCU.įor demonstration of SPI in STM32F103C8T6, the STM32 Blue Pill Board is configured as SPI Master and Arduino UNO is configured as SPI Slave. if you remember the pin configuration of the STM32 Blue Pill Board, you can see both the SPI Interfaces marked in purple colour.įor SPI1 Interface, there are two sets of pin configurations.

#Shift register using spi arduino full#

SPI in STM32F103C8T6Ĭoming to SPI in STM32F103C8T6 MCU, there are two SPI interfaces in this MCU and both can work in full duplex or simplex mode at speeds up to 18 Mbits/s.

#Shift register using spi arduino serial#

An important point to remember is that the Master device is responsible for generating the Clock Signal on the SCLK Line.įor more information on SPI Communication and its modes, refer to the “BASIC OF SERIAL PERIPHERAL INTERFACE” tutorial. It consists of a Shift Register and a Data Latch. The internal hardware of SPI Communication is very simple.

In a multi-slave configuration, each slave device has its own SS Signal from the Master and at any time, only one slave device can be active. Slave Select Signal is used to activate a particular slave by making the SS signal as LOW. The image also shows the direction of the corresponding signals. The following image shows the simple SPI Interface between a Master and a Slave.

MISO -> Master Input Slave Output (Data from Slave to Master).

MOSI -> Master Output Slave Input (Data from Master to Slave).

In this tutorial, I will be using the four wire SPI Communication and the four wires are called as: SPI, which is short for Serial Peripheral Interface, is one of the frequently used communication protocols for transfer of data between a Microcontroller and a wide range of peripheral devices like Flash Memories, EEPROMs, SD Cards, Sensors, LCDs, etc.Ī common way to implement SPI Communication is using four wires, although there are ways you can use lesser number of wires.

Programming Arduino for SPI Communication.

Programming STM32 for SPI Communication.